This cell?

Par. An unexceptionable vault:

Good brick and stone: the bats kept out, the rats

Kept in: a snug nook: how should I mistake it?

Fest. But wherefore am I here?

Par. Ah, well remembered!

Why, for a purpose—for a purpose, Festus!

'T is like me: here I trifle while time fleets,

And this occasion, lost, will ne'er return.

You are here to be instructed. I will tell